Polymers based on grafted polyolefins

Abstract

The present invention relates to a polymer (P1) obtainable by reaction of at least one component a) with at least one component b), wherein a) is at least one polyolefin (A), which is grafted with at least one compound (G), and b) is at least one compound (B) containing at least two epoxy groups.

The invention claimed is: 
     
       1. A composition, comprising: a polymer (P1) obtained by reacting a component a) with a component b); and a further polymer (P2), wherein:
 the component a) is at least one polyolefin (A), which is grafted with at least one compound (G), wherein the compound (G) is selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, citraconic acid, maleic anhydride, itaconic anhydride, crotonic anhydride, and citraconic anhydride; 
 the component b) is at least one compound (B) comprising at least two epoxy groups; and 
 the composition comprises 0.2 to 10 wt. % of the polymer (P1) relative to the amount of the further polymer (P2). 
 
     
     
       2. The composition according to  claim 1 , wherein the polymer (P2) is a polyolefin (C). 
     
     
       3. The composition according to  claim 2 , wherein the polyolefin (C) has the same definition as the polyolefin (A). 
     
     
       4. The composition according to  claim 1 , comprising 1 to 5 wt.-% of the polymer (P1) relative to the amount of the polymer (P2). 
     
     
       5. The composition according to  claim 4 , further comprising at least one further component selected from the group consisting of a stabilizer, an antioxidant, a UV-absorber, a metal deactivator, a metal quencher, a phosphite, a hydroxyamine, a nucleating agent, a filler, a reinforcing agent, a plasticizer, a lubricant, an emulsifier, a pigment, a catalyst, a flow promoter, an optical brightener, and an antistatic agent,
 wherein an amount of the at least one further component is 0.1 to 50 wt.-% relative to a sum of the amount of the polymer (P1) and the amount of the polymer (P2). 
 
     
     
       6. The composition according  claim 1 , which is a processed composition. 
     
     
       7. The composition according to  claim 6 , wherein the processed composition is a composition which is compounded and then optionally converted. 
     
     
       8. A process for producing the composition of  claim 1 , the process comprising reacting the component a) with the component b). 
     
     
       9. The process according to  claim 8 , wherein the reaction occurs in the presence of the further polymer (P2). 
     
     
       10. A process for producing the composition of  claim 1 , the process comprising mixing the polymer (P1) with the further polymer (P2). 
     
     
       11. A process for producing the composition of  claim 1 , the process comprising dispersing the component a) or the component b) in the polymer (P2) prior to production of the polymer (P1). 
     
     
       12. The process according to  claim 10 , wherein the composition is processed. 
     
     
       13. The process according to  claim 12 , wherein processing of the composition and production of the polymer (P1) occur simultaneously. 
     
     
       14. The process according to  claim 13 , which occurs during compounding. 
     
     
       15. The process according to  claim 14 , wherein the compounding occurs by extrusion. 
     
     
       16. A process for producing the composition of  claim 1 , the process comprising adding the component b) to a mixture of the polymer (P2) and the component a) to produce the polymer (P1). 
     
     
       17. The process according to  claim 16 , wherein the addition occurs as a compounding by extrusion. 
     
     
       18. A method for reducing the melt flow rate (MFR) of a subject polymer, the method comprising combining the composition of  claim 1  with the subject polymer. 
     
     
       19. The method according to  claim 18 , wherein the subject polymer is a recycled polyolefin. 
     
     
       20. The composition according to  claim 1 , wherein:
 the polyolefin (A) is selected from the group consisting of a polypropylene, a polypropylene copolymer, a polyethylene, and a metallocene-based polyolefin; 
 or 
 the compound (G) is selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, citraconic acid, maleic anhydride, itaconic anhydride, crotonic anhydride, and citraconic anhydride. 
 
     
     
       21. The composition according to  claim 20 , wherein the polyolefin (A) is selected from the group consisting of a low density polyethylene, and a high density polyethylene. 
     
     
       22. The composition according to  claim 1 , wherein the compound (B) is a polymerization product of;
 b1) an epoxy-functional (meth)acrylic monomer; and 
 b2) at least one of a styrenic monomer and a (meth)acrylic monomer. 
 
     
     
       23. The composition according to  claim 1 , wherein:
 the polymer (P1) is obtained by reacting a functional group of the component a) with an epoxy group of the compound b); and 
 the functional group is selected from the group consisting of an acid anhydride group (—CO—O—CO—), a carboxylic acid group (—COOH), a hydroxy group (—OH), and a salt thereof.